Cycript.l.in

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2010  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 /* XXX: supposedly I will be screwed on very very long multi-line comments and need to replace these with a manual lexer. http://websrv.cs.fsu.edu/~engelen/courses/COP5621/Pr2.pdf */
  23
  24 %{
  25 #define YYLTYPE cy::location
  26 #include "Cycript.tab.hh"
  27 typedef cy::parser::token tk;
  28
  29 #define YY_EXTRA_TYPE CYDriver *
  30
  31 #define F(value) do { \
  32     int token(value); \
  33     yyextra->statement_ = false; \
  34     return token; \
  35 } while (false)
  36
  37 #define A new($pool)
  38 #define Y apr_pstrmemdup($pool, yytext, yyleng)
  39
  40 #define I(type, Type, value) do { \
  41     yylval->type ## _ = A CY ## Type; \
  42     F(value); \
  43 } while (false)
  44
  45 #define T yylval->newline_ = yyextra->state_ == CYNewLine; BEGIN(Div);
  46 #define C T yyextra->state_ = CYClear;
  47 #define R T yyextra->state_ = CYRestricted;
  48
  49 #define E L C I(literal, RegEx(Y), tk::RegularExpressionLiteral);
  50
  51 #define N \
  52     if (yyextra->state_ != CYNewLine) { \
  53         if (yyextra->state_ != CYRestricted) \
  54             yyextra->state_ = CYNewLine; \
  55         else { \
  56             yyextra->state_ = CYClear; \
  57             F(tk::NewLine); \
  58         } \
  59     }
  60
  61 #define V(more) { \
  62     if (const char *nl = reinterpret_cast<const char *>(memchr(yytext, '\n', yyleng))) { \
  63         unsigned lines(0); \
  64         size_t left; \
  65         do { \
  66             ++lines; \
  67             left = yyleng - (nl - yytext) - 1; \
  68             nl = reinterpret_cast<const char *>(memchr(nl + 1, '\n', left)); \
  69         } while (nl != NULL); \
  70         yylloc->end.lines(lines); \
  71         yylloc->end.columns(left); \
  72         yylloc->step(); \
  73         more \
  74     } else L \
  75 }
  76
  77 #define L { \
  78     yylloc->step(); \
  79     yylloc->columns(yyleng); \
  80 }
  81
  82 int H(char c) {
  83     if (c >= '0' && c <= '9')
  84         return c - '0';
  85     if (c >= 'a' && c <= 'f')
  86         return c - 'a' + 10;
  87     if (c >= 'A' && c <= 'F')
  88         return c - 'A' + 10;
  89     return -1;
  90 }
  91
  92 #define YY_INPUT(data, value, size) { \
  93     if (yyextra->file_ != NULL) { \
  94         size_t copy(fread(data, 1, size, yyextra->file_)); \
  95         value = copy == 0 ? YY_NULL : copy; \
  96     } else if (yyextra->size_ == 0) \
  97         value = YY_NULL; \
  98     else { \
  99         size_t copy(size); \
 100         copy = (std::min(copy, yyextra->size_)); \
 101         memcpy(data, yyextra->data_, copy); \
 102         yyextra->data_ += copy; \
 103         yyextra->size_ -= copy; \
 104         value = copy; \
 105     } \
 106 }
 107
 108 %}
 109
 110 %option prefix="cy"
 111 %option bison-bridge
 112 %option bison-locations
 113 %option noyywrap
 114 %option yylineno
 115 %option nounput
 116 %option interactive
 117 %option reentrant
 118 %option stack
 119
 120 Exponent [eE][+-]?[0-9]+
 121 Escape   \\[\\'"bfnrtv]|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\\n
 122
 123 IdentifierStart [a-zA-Z$_]
 124 IdentifierPart  [a-zA-Z$_0-9]
 125
 126 NonTerminator [^\n]
 127 BackslashSequence \\{NonTerminator}
 128 RegularExpressionFirstChar [^\n*\\/]|{BackslashSequence}
 129 RegularExpressionChar [^\n\\/]|{BackslashSequence}
 130 RegularExpressionFlags {IdentifierPart}*
 131 RegularExpressionChars {RegularExpressionChar}*
 132 RegularExpressionBody {RegularExpressionFirstChar}{RegularExpressionChars}
 133
 134 @begin E4X
 135 XMLNameStart [a-zA-Z_:]
 136 XMLNamePart [a-zA-Z0-9.-_:]
 137 XMLName {XMLNameStart}{XMLNamePart}*
 138 @end
 139
 140 %s Div
 141 %s RegExp
 142
 143 @begin E4X
 144 %x XMLContent
 145 %x XMLTag
 146 @end
 147
 148 %%
 149
 150 <RegExp>\/{RegularExpressionBody}\/{RegularExpressionFlags} E
 151
 152 \/\/[^\n]* L
 153
 154         /* http://ostermiller.org/findcomment.html */
 155         /* XXX: unify these two rules using !? */
 156 \/\*!([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V() C I(comment, Comment(Y), tk::Comment);
 157 \/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\/ V(N)
 158
 159 @begin E4X
 160 <RegExp>"<>"      L F(tk::LeftRight);
 161 <XMLContent>"</>" L F(tk::LeftSlashRight);
 162
 163 <RegExp,XMLContent>\<!\[CDATA\[(\n|[^[]|\[[^[]|\[\[[^>])*]]> V() F(tk::XMLCDATA);
 164 <RegExp,XMLContent>\<!--(\n|[^-]|-[^-])*--> V() F(tk::XMLComment);
 165 <RegExp,XMLContent>\<?(\n|[^?]|\?[^>])*?> V() F(tk::XMLPI);
 166
 167 <XMLTag>"="  L F(tk::Equal);
 168 <XMLTag>">"  L F(tk::Right);
 169 <XMLTag>"/>" L F(tk::SlashRight);
 170 <XMLTag>"{"  L F(tk::OpenBrace);
 171
 172 <XMLTag>\"(\n|[^"])*\"|'(\n|[^'])*' V() F(tk::XMLAttributeValue);
 173 <XMLTag>{XMLName} L F(tk::XMLName);
 174 <XMLTag>[ \t\r\n] V() F(tk::XMLWhitespace);
 175
 176 <XMLContent>"{"  L F(tk::OpenBrace);
 177 <XMLContent>"<"  L F(tk::Left);
 178 <XMLContent>"</" L F(tk::LeftSlash);
 179 @end
 180
 181 "..."  L C F(tk::PeriodPeriodPeriod);
 182
 183 @begin E4X
 184 "::"   L C F(tk::ColonColon);
 185 ".."   L C F(tk::PeriodPeriod);
 186 @end
 187
 188 @begin E4X ObjectiveC
 189 "@"    L C F(tk::At);
 190 @end
 191
 192 "&"    L C F(tk::Ampersand);
 193 "&&"   L C F(tk::AmpersandAmpersand);
 194 "&="   L C F(tk::AmpersandEqual);
 195 "^"    L C F(tk::Carrot);
 196 "^="   L C F(tk::CarrotEqual);
 197 "="    L C F(tk::Equal);
 198 "=="   L C F(tk::EqualEqual);
 199 "==="  L C F(tk::EqualEqualEqual);
 200 "!"    L C F(tk::Exclamation);
 201 "!="   L C F(tk::ExclamationEqual);
 202 "!=="  L C F(tk::ExclamationEqualEqual);
 203 "-"    L C F(tk::Hyphen);
 204 "-="   L C F(tk::HyphenEqual);
 205 "--"   L C F(yylval->newline_ ? tk::HyphenHyphen_ : tk::HyphenHyphen);
 206 "->"   L C F(tk::HyphenRight);
 207 "<"    L C F(tk::Left);
 208 "<="   L C F(tk::LeftEqual);
 209 "<<"   L C F(tk::LeftLeft);
 210 "<<="  L C F(tk::LeftLeftEqual);
 211 "%"    L C F(tk::Percent);
 212 "%="   L C F(tk::PercentEqual);
 213 "."    L C F(tk::Period);
 214 "|"    L C F(tk::Pipe);
 215 "|="   L C F(tk::PipeEqual);
 216 "||"   L C F(tk::PipePipe);
 217 "+"    L C F(tk::Plus);
 218 "+="   L C F(tk::PlusEqual);
 219 "++"   L C F(yylval->newline_ ? tk::PlusPlus_ : tk::PlusPlus);
 220 ">"    L C F(tk::Right);
 221 ">="   L C F(tk::RightEqual);
 222 ">>"   L C F(tk::RightRight);
 223 ">>="  L C F(tk::RightRightEqual);
 224 ">>>"  L C F(tk::RightRightRight);
 225 ">>>=" L C F(tk::RightRightRightEqual);
 226 "*"    L C F(tk::Star);
 227 "*="   L C F(tk::StarEqual);
 228 "~"    L C F(tk::Tilde);
 229
 230 <Div>"/"  L C F(tk::Slash);
 231 <Div>"/=" L C F(tk::SlashEqual);
 232
 233 ":"    L C F(tk::Colon);
 234 ","    L C F(tk::Comma);
 235 "?"    L C F(tk::Question);
 236 ";"    L C F(tk::SemiColon);
 237
 238 "("    L C F(tk::OpenParen);
 239 ")"    L C F(tk::CloseParen);
 240
 241 "{"    L C F(yyextra->statement_ ? tk::OpenBrace__ : yylval->newline_ ? tk::OpenBrace_ : tk::OpenBrace);
 242 "}"    L C F(tk::CloseBrace);
 243
 244 "["    L C F(tk::OpenBracket);
 245 "]"    L C F(tk::CloseBracket);
 246
 247 @begin Java
 248 "@class"          L C F(tk::AtClass);
 249 @end
 250
 251 @begin ObjectiveC
 252 "@end"            L C F(tk::AtEnd);
 253 "@implementation" L C F(yyextra->statement_ ? tk::AtImplementation_ : tk::AtImplementation);
 254 "@import"         L C F(tk::AtImport);
 255 "@selector"       L C F(tk::AtSelector);
 256 @end
 257
 258 "false"        L C I(false, False(), tk::False);
 259 "null"         L C I(null, Null(), tk::Null);
 260 "true"         L C I(true, True(), tk::True);
 261
 262 "break"        L R I(word, Word("break"), tk::Break);
 263 "case"         L C I(word, Word("case"), tk::Case);
 264 "catch"        L C I(word, Word("catch"), tk::Catch);
 265 "continue"     L R I(word, Word("continue"), tk::Continue);
 266 "default"      L C I(word, Word("default"), tk::Default);
 267 "delete"       L C I(word, Word("delete"), tk::Delete);
 268 "do"           L C I(word, Word("do"), tk::Do);
 269 "else"         L C I(word, Word("else"), tk::Else);
 270 "finally"      L C I(word, Word("finally"), tk::Finally);
 271 "for"          L C I(word, Word("for"), tk::For);
 272 "function"     L C I(word, Word("function"), yyextra->statement_ ? tk::Function_ : tk::Function);
 273 "if"           L C I(word, Word("if"), tk::If);
 274 "in"           L C I(word, Word("in"), yyextra->in_.top() ? tk::In_ : tk::In);
 275 "instanceof"   L C I(word, Word("instanceof"), tk::InstanceOf);
 276 "new"          L C I(word, Word("new"), tk::New);
 277 "return"       L R I(word, Word("return"), tk::Return);
 278 "switch"       L C I(word, Word("switch"), tk::Switch);
 279 "this"         L C I(this, This(), tk::This);
 280 "throw"        L R I(word, Word("throw"), tk::Throw);
 281 "try"          L C I(word, Word("try"), tk::Try);
 282 "typeof"       L C I(word, Word("typeof"), tk::TypeOf);
 283 "var"          L C I(word, Word("var"), tk::Var);
 284 "void"         L C I(word, Word("void"), tk::Void);
 285 "while"        L C I(word, Word("while"), tk::While);
 286 "with"         L C I(word, Word("with"), tk::With);
 287
 288 "debugger"     L C I(word, Word("debugger"), tk::Debugger);
 289
 290 "const"        L C I(word, Word("const"), tk::Const);
 291
 292 "class"        L C I(word, Word("class"), tk::Class);
 293 "enum"         L C I(word, Word("enum"), tk::Enum);
 294 "export"       L C I(word, Word("export"), tk::Export);
 295 "extends"      L C I(word, Word("extends"), tk::Extends);
 296 "import"       L C I(word, Word("import"), tk::Import);
 297 "super"        L C I(word, Word("super"), tk::Super);
 298
 299 "implements"   L C I(identifier, Identifier("implements"), tk::Implements);
 300 "interface"    L C I(identifier, Identifier("interface"), tk::Interface);
 301 "package"      L C I(identifier, Identifier("package"), tk::Package);
 302 "private"      L C I(identifier, Identifier("private"), tk::Private);
 303 "protected"    L C I(identifier, Identifier("protected"), tk::Protected);
 304 "public"       L C I(identifier, Identifier("public"), tk::Public);
 305 "static"       L C I(identifier, Identifier("static"), tk::Static);
 306
 307 "abstract"     L C I(identifier, Identifier("abstract"), tk::Abstract);
 308 "boolean"      L C I(identifier, Identifier("boolean"), tk::Boolean);
 309 "byte"         L C I(identifier, Identifier("byte"), tk::Byte);
 310 "char"         L C I(identifier, Identifier("char"), tk::Char);
 311 "double"       L C I(identifier, Identifier("double"), tk::Double);
 312 "final"        L C I(identifier, Identifier("final"), tk::Final);
 313 "float"        L C I(identifier, Identifier("float"), tk::Float);
 314 "goto"         L C I(identifier, Identifier("goto"), tk::Goto);
 315 "int"          L C I(identifier, Identifier("int"), tk::Int);
 316 "long"         L C I(identifier, Identifier("long"), tk::Long);
 317 "native"       L C I(identifier, Identifier("native"), tk::Native);
 318 "short"        L C I(identifier, Identifier("short"), tk::Short);
 319 "synchronized" L C I(identifier, Identifier("synchronized"), tk::Synchronized);
 320 "throws"       L C I(identifier, Identifier("throws"), tk::Throws);
 321 "transient"    L C I(identifier, Identifier("transient"), tk::Transient);
 322 "volatile"     L C I(identifier, Identifier("volatile"), tk::Volatile);
 323
 324 "let"          L C I(identifier, Identifier("let"), tk::Let);
 325 "yield"        L C I(identifier, Identifier("yield"), tk::Yield);
 326
 327 "each"         L C I(identifier, Identifier("each"), tk::Each);
 328
 329 @begin E4X
 330 "namespace"    L C I(identifier, Identifier("namespace"), tk::Namespace);
 331 "xml"          L C I(identifier, Identifier("xml"), tk::XML);
 332 @end
 333
 334 {IdentifierStart}{IdentifierPart}* L C I(identifier, Identifier(Y), tk::Identifier_);
 335
 336 (\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?){Exponent}? L C I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral);
 337
 338 0[xX][0-9a-fA-F]+ L C I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral);
 339 0[0-7]+ L C I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral);
 340 0[bB][0-1]+ L C I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral);
 341
 342 \"([^"\\\n]|{Escape})*\"|'([^'\\\n]|{Escape})*' L C {
 343     char *value(A char[yyleng]);
 344     char *local(value);
 345
 346     for (yy_size_t i(1), e(yyleng - 1); i != e; ++i) {
 347         char next(yytext[i]);
 348
 349         if (yytext[i] == '\\')
 350             switch (next = yytext[++i]) {
 351                 case '\n': continue;
 352                 case '\\': next = '\\'; break;
 353                 case '\'': next = '\''; break;
 354                 case '"': next = '"'; break;
 355                 case 'b': next = '\b'; break;
 356                 case 'f': next = '\f'; break;
 357                 case 'n': next = '\n'; break;
 358                 case 'r': next = '\r'; break;
 359                 case 't': next = '\t'; break;
 360                 case 'v': next = '\v'; break;
 361                 case '0': next = '\0'; break;
 362
 363                 case 'x':
 364                     next = H(yytext[i + 1]) << 4 | H(yytext[i + 2]);
 365                     i += 2;
 366                 break;
 367             }
 368
 369         *local++ = next;
 370     }
 371
 372     *local = '\0';
 373     I(string, String(value, local - value), tk::StringLiteral);
 374 }
 375
 376 \r?\n|\r|\xe2\x80[\xa8\xa9] yylloc->end.lines(); yylloc->step(); N
 377
 378 [ \t] L
 379
 380 <<EOF>> if (yyextra->auto_) { yyextra->auto_ = false; F(tk::AutoComplete); } L yyterminate();
 381
 382 . L {
 383     CYDriver::Error error;
 384     error.location_ = *yylloc;
 385     error.message_ = "syntax error, unknown token";
 386     yyextra->errors_.push_back(error);
 387     yyterminate();
 388 }
 389
 390 %%
 391
 392 void CYDriver::ScannerInit() {
 393     cylex_init(&scanner_);
 394     cyset_extra(this, scanner_);
 395 }
 396
 397 void CYDriver::ScannerDestroy() {
 398     cylex_destroy(scanner_);
 399 }
 400
 401 CYDriver::Condition CYDriver::GetCondition() {
 402     switch (yy_top_state(scanner_)) {
 403         case RegExp:
 404             return RegExpCondition;
 405 @begin E4X
 406         case XMLContent:
 407             return XMLContentCondition;
 408         case XMLTag:
 409             return XMLTagCondition;
 410 @end
 411         default:
 412             _assert(false);
 413     }
 414 }
 415
 416 void CYDriver::SetCondition(Condition condition) {
 417     struct yyguts_t *yyg(reinterpret_cast<struct yyguts_t *>(scanner_));
 418
 419     switch (condition) {
 420         case RegExpCondition:
 421             BEGIN(RegExp);
 422             break;
 423 @begin E4X
 424         case XMLContentCondition:
 425             BEGIN(XMLContent);
 426             break;
 427         case XMLTagCondition:
 428             BEGIN(XMLTag);
 429             break;
 430 @end
 431         default:
 432             _assert(false);
 433     }
 434 }
 435
 436 void CYDriver::PushCondition(Condition condition) {
 437     switch (condition) {
 438         case RegExpCondition:
 439             yy_push_state(RegExp, scanner_);
 440             break;
 441 @begin E4X
 442         case XMLContentCondition:
 443             yy_push_state(XMLContent, scanner_);
 444             break;
 445         case XMLTagCondition:
 446             yy_push_state(XMLTag, scanner_);
 447             break;
 448 @end
 449         default:
 450             _assert(false);
 451     }
 452 }
 453
 454 void CYDriver::PopCondition() {
 455     yy_pop_state(scanner_);
 456 }